52727

Properties

Appears in sequences

• Numbers n such that 295*2^n-1 is prime.at n=22A050906
• a(0) = 1; a(n) = Sum_{0 <= k < n and gcd(k, n) != 1} a(k).at n=35A054251
• Primes with only prime digits and whose initial, all intermediate and final iterated sums of digits are primes.at n=19A070029
• Smaller of a pair of consecutive primes having only prime digits.at n=24A082755
• Primes with a prime number of digits, all of them prime, that add up to a prime.at n=38A110028
• Primes occurring in A084704 exactly 4 times.at n=28A128655
• a(n) = 78*n^2 - 1.at n=25A158771
• Primes of the form 3n^3-1.at n=6A200846
• Primes that contain only the digits (2, 5, 7).at n=24A214705
• Positive numbers k such that (10^(k+2)*109 + 89)/9 is prime.at n=5A287017
• a(n) is the smallest prime p such that there is a multiplicative subgroup H of Z/pZ, of odd order and of index 2n, such that for any two cosets H1 and H2 of H, H1 + H2 contains all of (Z/pZ)\0, except that H+H contains all of (Z/pZ)\0 except -H. If no such prime exists, a(n) = 0.at n=40A294615
• Primes that are palindromic in factorial base.at n=39A333421
• a(n) = 3*n^3 - 1.at n=26A345701
• Times on a 12-hour digital clock with 6 digits at which the angle of the sector enclosing the three continuously moving hands of an analog clock has a local minimum.at n=5A348758
• Maximal sequence of primes whose digits are primes and whose digit sum is also a term.at n=15A360497
• Primes having only {2, 5, 7, 8} as digits.at n=43A386162
• Prime numbersat n=5383